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Maine · county maple atlas

Maple sugaring in Sagadahoc County, Maine

Sagadahoc County had 11 maple operations and 226 taps in the 2022 Census. Around Bath, sap usually runs from March 1 to April 8. Here's the long-run pattern, 36 seasons of sap weather, and the outlook this week.
Too early to tapAbout 146 days until the usual start.
Sap starts
Mar 1
typical year
Season ends
Apr 8
about 5 weeks
Sap days / season
48.3
1991–2026 average
Taps, 2022
226
#16 of 16 in ME

Sap-flow outlook at Bath right now

Full Maine forecast →

Forecast for Bath, ME

Updated Oct 6, 6:54 AM EDT

Off-season for now. Sap needs freezing nights, and none are in sight. Sagadahoc County's season usually opens around March 1, which is 146 days away.

No freeze-thaw days in the forecast

freeze thaw 32°F

  1. WedOct 7
    45° / 59°

    0h below · 24h above

    No refreeze forecast
  2. ThuOct 8
    53° / 66°

    0h below · 24h above

    No refreeze forecast
  3. FriOct 9
    48° / 62°

    0h below · 24h above

    No refreeze forecast
  4. SatOct 10
    46° / 60°

    0h below · 24h above

    No refreeze forecast
  5. SunOct 11
    45° / 62°

    0h below · 24h above

    No refreeze forecast
  6. MonOct 12
    53° / 65°
    No refreeze forecast

Data: National Weather Service. Verdicts use freeze-thaw thresholds from maple field research; your woods may run a little differently.

When the sap runs

The sugaring calendar at Bath

Freeze-thaw weather at Bath peaks in the weeks of Mar 2 to Apr 6, which hold about 40% of a season's sap days. March is the busiest month.
Typical season: Mar 1 – Apr 80246Week of Dec 1: 2.6 sap days on averageWeek of Dec 8: 2.5 sap days on averageWeek of Dec 15: 2.2 sap days on averageWeek of Dec 22: 2.1 sap days on averageWeek of Dec 29: 1.9 sap days on averageWeek of Jan 5: 1.2 sap days on averageWeek of Jan 12: 1.6 sap days on averageWeek of Jan 19: 1.2 sap days on averageWeek of Jan 26: 1.3 sap days on averageWeek of Feb 2: 1.6 sap days on averageWeek of Feb 9: 1.9 sap days on averageWeek of Feb 16: 2.6 sap days on averageWeek of Feb 23: 2.1 sap days on averageWeek of Mar 2: 2.5 sap days on averageWeek of Mar 9: 3.3 sap days on averageWeek of Mar 16: 3.4 sap days on averageWeek of Mar 23: 3.6 sap days on averageWeek of Mar 30: 3.3 sap days on averageWeek of Apr 6: 3.4 sap days on averageWeek of Apr 13: 1.9 sap days on averageWeek of Apr 20: 1.4 sap days on averageWeek of Apr 27: 0.7 sap days on averageWeek of May 4: 0.1 sap days on averageWeek of May 11: 0.1 sap days on averageWeek of May 18: 0.0 sap days on averageWeek of May 25: 0.0 sap days on averageDecJanFebMarAprMaytaps in ~Mar 1
Average number of freeze-thaw sap days in each week of the season at Bath, 1991–2026. A sap day is an overnight low under 30.2 °F followed by an afternoon high over 37.4 °F. The shaded band is the typical season.

Year-to-year spread

Opening signal
Median Mar 10; the middle half of seasons fell between Mar 4 and Mar 16. Earliest Feb 17 (2012), latest Mar 22 (2015).
Closing signal
Median Apr 12; middle half between Apr 6 and Apr 17. Earliest Mar 17 (2012), latest Apr 22 (1997).
Sap days by month
Dec21%Jan13%Feb17%Mar29%Apr20%May1%

36 seasons of sap weather

Sagadahoc County seasons, 1991–2026

The best sap year at Bath was 2023 with 68 freeze-thaw days; the leanest was 2015 with 34. Seasons that start early tend to end early too: the trees run on the swing between freezing nights and mild days, and heat ends it.
JanFebMarAprMaysap days20262026: Mar 10 – Apr 12, 39 sap days3920252025: Mar 12 – Apr 11, 43 sap days4320242024: Mar 4 – Apr 4, 51 sap days5120232023: Mar 7 – Apr 10, 68 sap days6820222022: Mar 2 – Apr 6, 45 sap days4520212021: Mar 4 – Apr 4, 38 sap days3820202020: Mar 4 – Apr 8, 64 sap days6420192019: Mar 17 – Apr 18, 54 sap days5420182018: Mar 17 – Apr 21, 58 sap days5820172017: Mar 7 – Apr 9, 49 sap days4920162016: Feb 25 – Apr 1, 63 sap days6320152015: Mar 22 – Apr 16, 34 sap days3420142014: Mar 18 – Apr 21, 37 sap days3720132013: Mar 9 – Apr 8, 58 sap days5820122012: Feb 17 – Mar 17, 57 sap days5720112011: Mar 15 – Apr 16, 42 sap days4220102010: Feb 23 – Mar 29, 44 sap days4420092009: Mar 14 – Apr 17, 37 sap days3720082008: Mar 16 – Apr 17, 44 sap days4420072007: Mar 16 – Apr 20, 50 sap days5020062006: Feb 27 – Apr 3, 51 sap days5120052005: Mar 13 – Apr 17, 47 sap days4720042004: Mar 16 – Apr 18, 52 sap days5220032003: Mar 17 – Apr 20, 38 sap days3820022002: Mar 8 – Apr 12, 54 sap days5420012001: Mar 20 – Apr 21, 46 sap days4620002000: Feb 27 – Apr 2, 45 sap days4519991999: Mar 4 – Apr 6, 59 sap days5919981998: Feb 24 – Mar 26, 45 sap days4519971997: Mar 18 – Apr 22, 51 sap days5119961996: Mar 10 – Apr 14, 40 sap days4019951995: Mar 10 – Apr 12, 48 sap days4819941994: Mar 9 – Apr 12, 41 sap days4119931993: Mar 12 – Apr 8, 36 sap days3619921992: Mar 17 – Apr 17, 50 sap days5019911991: Mar 3 – Apr 4, 60 sap days60
Each bar runs from the season's opening signal to its closing signal, estimated from daily temperatures at Bath. Dashed lines mark the typical dates. The right column counts freeze-thaw sap days from December through May.

Maple production

Sagadahoc County in the Census of Agriculture

USDA counts maple operations every five years. In Sagadahoc County the 2022 Census found 11 farms making syrup (+38% since 2017), with taps -95% and syrup output -78% over the same five years. That works out to about 0.24 gallons of syrup per tap in 2022 (0.05 in 2017). Among the 385 counties in this atlas, Sagadahoc County ranks 341 by taps.

Sagadahoc County maple production, 2017 and 2022 (USDA Census of Agriculture)
Census yearFarmsTapsGallons of syrupGal / tap
202211226550.24
201784,9402490.05

Nearby

Neighboring maple counties

Distances are between reference towns; typical dates are each county's own estimate.

About these numbers

The season dates are estimated from 36 seasons of daily high and low temperatures for the PRISM 4-km grid cell at Bath (56ft), scored with the same freeze-thaw rule as our live forecast: a sap day is an overnight low under 30.2 °F followed by an afternoon high over 37.4 °F. Each season's closing signal is the last sap day before accumulated warmth reaches a threshold, and the opening signal sits five weeks before that, never earlier than the first real freeze-thaw week. Tested against 117 state-seasons of USDA-reported dates, the rule lands within 5.5 days of the reported close and 6.6 days of the reported opening on average, and the typical dates shown here are scaled to Maine's USDA record (12 years). Production figures are copied from the Census as published. Full method, calibration tables and the downloadable dataset →

Sources · 6

  1. 1.2022 Census of Agriculture, County Level Data — Maine, Table 37: Maple Syrup, 2022 and 2017 · USDA National Agricultural Statistics Service
  2. 2.PRISM daily temperature grids (AN81d, 4 km), accessed 2026-10-05 · PRISM Group, Oregon State University, https://prism.oregonstate.edu
  3. 3.Applied Climate Information System (ACIS) web services · NOAA Regional Climate Centers
  4. 4.USDA NASS maple syrup reports — approximate average season opened and closed dates, 2011–2022 · USDA National Agricultural Statistics Service (mirrored by the University of Vermont)
  5. 5.Sap flow in sugar maple: timing and weather drivers (Frontiers in Agronomy, 2025) · de Lima Santos et al.
  6. 6.GeoNames gazetteer (cities500), CC BY 4.0 · GeoNames

FAQ

Sagadahoc County sugaring questions

When should I tap maple trees in Sagadahoc County, Maine?
In a typical year the sap starts running around March 1 near Bath and the season winds down around April 8. Have your taps in a day or two before the first forecast string of freezing nights and 40 °F days. In the past 36 seasons the weather signal came as early as Feb 17 and as late as Mar 22.
How much maple syrup does Sagadahoc County produce?
The 2022 Census of Agriculture counted 11 maple operations in Sagadahoc County with 226 taps producing 55 gallons of syrup, ranking 16 of 16 Maine's counties with published tap counts.
How many sap days does Sagadahoc County get in a season?
On average 48.3 freeze-thaw sap days from December through May at Bath, of which about 18 are textbook days with a night in the 20s and a day in the 40s. The best season since 1991 was 2023 (68 sap days); the leanest was 2015 (34).
Where do these dates come from?
From 36 seasons of daily high and low temperatures at Bath (PRISM 4-km grid), scored with the same freeze-thaw rule as our live forecast, then calibrated against USDA's reported season dates for Maine. They describe a typical year at one point in the county; your sugarbush, slope and elevation can shift them by days.

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